'Name of the Lord' in the Bible

But David replied to the Philistine, "You are coming against me with sword and spear and javelin. But I am coming against you in the name of the Lord of hosts, the God of Israel's armies, whom you have defied!

Jonathan said to David, "Go in peace, for the two of us have sworn together in the name of the Lord saying, 'The Lord will be between me and you and between my descendants and your descendants forever.'"Then David got up and left, while Jonathan went back to the city.